Furman SPR-20 Relay Noise

I have a Furman SPR-20 AC regenerator powering the majority of my system.

It has started to send a significant buzzing into my audio components, which goes away when I plug the components directly into the wall socket or use a power strip.

After doing some research it seems that a capacitor may have failed leading to relay noise passing through and not being filtered out by the capacitor.

Question I have is which capacitor needs to be replaced?
I have included a photo below. It looks like maybe the orange capacitor, but I’m not totally sure.